Mine trap-door



Patented Nov. l, |898.

J. W. SHALLENBERGER.

MINE TRAP DUUR.

(Application led Feb. 10. 189B.)

2 Sheets-Sheet I.y

(No Model.)

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Patented Nov. I; |898. J. W. SHALLENBERGEH.

MINE TRAP D003.

(Application mea Feb. 1o, 189s.)

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y NITED *rares Eric 3 ATENT JOHN W. SHALLENBERGER, OF CANAL FULTON, OHIO, ASSIGNOR OF ONE- HALF TO EMANUEL H. WENGER, OF BURTON CITY, OHIO.

MINE TRAP-DOOR.

SPECIFICATION forming part of Letters Patent No. 613,607, dated November 1, 1898. Application filed February `10, 1898. Serial No. 669,801. (No model.)

To all whom t may con/cern.-

Be it known that I, JOHN W. SHALLENBER- GER, a citizen of the United States, residing at Canal Fulton, in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Mine Trap-Doors; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, and to the figures of reference marked thereon, in which- Figure 1 is a perspective View showing the door open and illustrating a car in dotted lines. Fig. 2 is a view showing a portion of a car and the trip-arm and post in relative position to operate the door. Fig. 3 is a perspective view showing the door closed.

The present invention has relation to mine trap-doors; and it consists in the different` parts and combination of parts hereinafter described, and particularly pointed out inthe claims.

The object of the invention is to prevent the rapid escape of air from the mine.

Similar numerals of reference indicate corresponding parts in all the figures of the drawings.

In the accompanying drawings, 1 represents .the railway-track, which ls constructed in the ordinary manner. At the sides of the track are located the posts 2, which posts are formed of the height to allow a car to pass under the door when brought into the position illustrated in Fig. 1. The posts 2 are held in proper upright position by suitable cross-bars B or their equivalents. The upright bars 4 are located substantially as illustrated in the drawings and may ybe connected to two of the posts 2, if desired.

At one side of the track 1 are located the adjustable posts 5, which adjustable posts are set upon each side of the door and a sufiicient distance away to carry out the objects herein described. To the top or upper end of the posts 5 are pivotally attached the triplevers 6, which trip-levers are so located that they will be struck by the car-wheels 7 at the time the car passes the trip-levers. To the trip-levers 6 are securely attached the barsS, which bars are located and arranged substantially as shown in the drawings. Between the posts 2 is located the pivoted bar 9, which bar is shown pivotally attached to the bar 10; but it will be understood that the bar 9 may be attached to any other fixed object without departing from the nature of my invention. To the bars 8 are connected the rods 11, 12, 13, and 14 by means of the chains 15; but it will be understood that the purposes hereinafter described can be carried out by the use of cords or cables equally as well as by the use of the rods and chains shown in the drawings.

Upon each side of the door proper and the framework appertaining to the door arelocated the rock-arms 16 and 17, which arms extend upward upon each side of the track 1, as illustrated in the drawings, and are formed of a length to correspond substantially with the height of the door proper. On the upper ends of the posts 2 or their equivalents is journaled the roller 18, which roller is located and arranged substantially as shown in the drawings and is for the purpose of providing a suitable support for the flexible door 19, which door is preferably formed of heavy canvas. To each end of the canvas door 19is attached a suitable bar, such as 2O and 21. At the bottom or lower ends of the posts 4 are j'ournaled the grooved pulleys 22, and to the upper ends thereof are j ournaled the grooved pulleys 23. To the top or upper ends of the rock-arms 17 are connected the cords 24t,which cords extend over the grooved pulleys 23 and under the grooved pulleys 22, and thence upward and are connected to the bar 20, which bar is securely attached to the door 19. To the upper ends of the rock-arms-16 are connected the cords 25, which cords extend over the pulleys 26 and are connected to the bar 21, which bar is securely attached to the door 19. It will be understood that the normal position of the door 19 is that shown in Fig. 3, and as a car approaches from the right the front wheel of the car on the side adjacent to the trip-lever 6 will strike said trip-lever and rock or move it forward, or in the direction the car is moving, and at the same time will rock the bar 8 and by means of the connection 13 will pull the upper end of the bar 9 in the direction indicated by the arrow,which in IOO turn pulls the rock-bar 17 upward, or toward the door, by means of the rod 27, and as the rock-bar 17 is pulled upward the rock-arm 16 will be thrown toward the car, which pulls the door 19 into the position illust-rated in Fig. 1 by means of the cords 25, it being understood that the rock-arms 16 and 17 move in unison by reason of the bar 28 being pivotally connected to each of the rock-arms.

The object and purpose of providing the adjustable posts 5 is to regulate the height of the trip-levers 6, so that they can be adj usted for dierent-sized car-Wheels, and at the same time regulate the throw of the trip-levers 6.

It will be understood that When the car has passed the trip-levers 6 in either direction the door 19 will be brought into the position illustrated in Fig. 1, Which allows the car to pass under the door, and after the car has passed under the door the wheels will operate the trip-levers at the left, which closes the door or brings it into the position illustrated in Fig. 3.

For the purpose of holding the adjustable posts 5, or rather the upper sections thereof, the slots 29 are provided, and also slots 30, formed in the upper sections 31 of the posts 5, and when the upper sections have been brought to the required point of adjustment the clamp-bolts 32 are tightened.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination of a flexible door, passing over a roller j ournaled above a railwaytrack; connected rock-arms 16 and 17, -on opposite sides of the door; trip-levers mounted on posts at one side of the track, and located in the path of the car-wheels; bars 8 operated by the trip-levers, and connected by rods 11, l2, 13, and 14: with bar 9; bars 27 joining bar 9 to the rock-arms, and cords connecting the opposite rock-arms to opposite ends of the door, all substantially as set forth.

2. The combination of a frame; a roller journaled to the upper portion of the frame; a flexible door 'passing over the roller, and the roller located above a railway-track connected rock-arms 16 and 17 located upon opposite sides of the door; trip-levers mounted on posts at one side of the track, and located in the path of the car-Wheels; bars 8 operated by the trip-levers and connected by rods 11, 12, 13, and 14: with bar 9; bars 27 joining bar 9 to the rock-arms, and cords connecting the opposite rock-arms to the opposite ends of the door, all substantially as set forth.

3. The combination of a frame located above a railway-track; a roller journaled to the upper portion of the frame; a iiexible door passing over the roller and cords connected to the ends of the door; connected rock-arms having attached thereto the doorcords; trip-levers mounted on posts at one side of the track, and bars for operating the rock-arms, substantially as and for the purpose specified.

4. The combination of a railway-track, adjustable posts located at the side of the track; trip-levers mounted on the adjustable posts and located in the path of the car-wheels; a frame located above the railway-track provided with a roller located at its upper end or portion; a flexible door passing over the roller; connected rock-arms 16 and 17 located on opposite sides of the door; cords connected to the ends of the door and to the rock-arms; bars 8 operated by the trip-levers, and connected by rods 11, 12, 13, and 14 with bar 9; and bars 27 joining bar 9 to the rock-arms, substantially as and for the purpose specified.

In testimony that I claim the above Ihave hereunto subscribed my naine in the presence of two witnesses.

JOHN W. SHALLENBERGER.

Vitnesses:

J. A. J EFFERS, F. W. BOND. 

